There is a Dragon Ball Xenoverse Super Pack on newer consoles. Do not buy that. It is not compatible with the Xbox 360 version. The Xbox 360 DLC is labeled specifically as "GT Pack 1" (320 Microsoft Points / ~$4) and "DLC Pack 3" etc.
It delivers Future Gohan, the most emotional story missions, the Warp Kamehameha (best move in the game), and the hardest Parallel Quests. For the purest Dragon Ball Xenoverse experience on Microsoft’s old white box, that is the king. dragon ball xenoverse xbox 360 dlc best
Do not buy "Dragon Ball Xenoverse: Season Pass" on Xbox 360. It often fails to download due to legacy licensing errors. Buy the packs individually. There is a Dragon Ball Xenoverse Super Pack